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A predictive Markov decision process for optimizing inspection and maintenance strategies of partially observable multi-state systems

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  • Guo, Chunhui
  • Liang, Zhenglin

Abstract

Optimizing both inspection and maintenance strategies for multi-state systems is challenging, especially when the inspected conditions contain uncertainties. One classic approach for addressing this issue is the Partially Observable Markov Decision Process (POMDP). However, the POMDP often considers the system is periodically inspected, resulting in a waste of inspection resources (cost and manpower) in the early stage of the system. To predictively optimize the inspection strategies, we formulate a new model-Predictive Markov Decision Process (PMDP). It extends the POMDP by embedding the Forward algorithm for inspection timing prediction and the Baum–Welch algorithm for model parameters estimation. Therefore, it could harvest the inspection information for predicting the successive inspection timing in an online updating scheme based on the new observation. In this manner, maintenance actions can take place at the predicted inspection timing that reduces unnecessary inspections. The PMDP manifests the power of predictive maintenance. As illustrated by the case study, the PMDP outperforms the POMDP under routine inspection by saving 26.3% of the cost on average.

Suggested Citation

  • Guo, Chunhui & Liang, Zhenglin, 2022. "A predictive Markov decision process for optimizing inspection and maintenance strategies of partially observable multi-state systems," Reliability Engineering and System Safety, Elsevier, vol. 226(C).
    • Handle: RePEc:eee:reensy:v:226:y:2022:i:c:s0951832022003167
    DOI: 10.1016/j.ress.2022.108683
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    4. Wang, Siqi & Zhao, Xian & Wu, Congshan & Wang, Xiaoyue, 2023. "Joint optimization of multi-stage component reassignment and preventive maintenance for balanced systems considering imperfect maintenance," Reliability Engineering and System Safety, Elsevier, vol. 237(C).
    5. Gámiz, M.L. & Navas-Gómez, F. & Raya-Miranda, R. & Segovia-García, M.C., 2023. "Dynamic reliability and sensitivity analysis based on HMM models with Markovian signal process," Reliability Engineering and System Safety, Elsevier, vol. 239(C).
    6. Cha, Ji Hwan & Finkelstein, Maxim, 2024. "Preventive maintenance for the constrained multi-attempt minimal repair," Reliability Engineering and System Safety, Elsevier, vol. 243(C).
    7. Arcieri, Giacomo & Hoelzl, Cyprien & Schwery, Oliver & Straub, Daniel & Papakonstantinou, Konstantinos G. & Chatzi, Eleni, 2023. "Bridging POMDPs and Bayesian decision making for robust maintenance planning under model uncertainty: An application to railway systems," Reliability Engineering and System Safety, Elsevier, vol. 239(C).
    8. Sun, Qin & Li, Hongxu & Zhong, Yuanfu & Ren, Kezhou & Zhang, Yingchao, 2024. "Deep reinforcement learning-based resilience enhancement strategy of unmanned weapon system-of-systems under inevitable interferences," Reliability Engineering and System Safety, Elsevier, vol. 242(C).

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